Heating Water Connections - Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual

Connections
Boiler Connections
Legend
- DHW tank heating supply for B1HA boilers
A
- DHW tank heating return for B1HA boilers
B
- DHW for B1KA boiler
C
- DCW for B1KA boiler
D
BWR Boiler water return
BWS Boiler water supply
BD Boiler drain
BF Boiler fill
GC Gas connection
PRV Pressure relief valve
PG Pressure gauge
VC Venting connection
TG Temperature gauge
DHW PRV Domestic hot water pressure relief valve (150 psi)
20
(continued)
* Field supplied
* Field supplied
Vitodens 100-W, B1HA series & B1KA Combi Installation/Service

Heating water connections

1. Thoroughly flush heating system (particularly before
connecting the boiler to an existing system).
2. Connect boiler to the heating system.
Note: Use an approved pipe sealant or teflon tape
when connecting the installation fittings.
Max. operating pressure.......................3 bar (45 psig)
Test pressure......................................4 bar (60 psig)
IMPORTANT
Damage resulting from pressure exceeding those values
stated is not covered by Viessmann warranty.
Use a two-hand wrench method when tightening

fittings or piping onto the boiler connectors. Use
one wrench to prevent the boiler pipes from twisting
and the second wrench to tighten the fitting or
piping. Failure to support the boiler connection could
damage the boiler and its internal piping.
WARNING
The pressure gage is a sensitive component and may
be damaged if the boiler connections are not supported
by using a second wrench when tightening fittings
and/or piping.
All plumbing must meet or exceed all local state and

national plumbing codes.
IMPORTANT
SUPPORT ALL PIPING USING HANGERS. DO NOT support
piping by the boiler or its components.
Use isolation valves to isolate system components.

The B1HA DHW tank heating supply and return ports

must remain capped if the DHW tank is not used.
Note: The B1HA DHW supply and return connections are
supplied capped. For installations that require DHW
tank connections remove caps. For installations that
do not require DHW tank connections leave caps
installed.